"Air baths are good for preventing colds... What you do is strip naked mornings and evenings and then bob up and down for a while." -The Golden Age (now Awake!) of February 10, 1926 page 310
"All human ailments have their start in the intestines." -The Golden Age of November 28, 1928 page 133
"Sleep on the right side or flat on your back, with the head toward the north so as to get benefit of the earth's magnetic currents. Avoid serum inoculations as they pollute the blood stream with their filthy pus... Stop chewing gum, as you need the saliva for your food." -The Golden Age of November 12, 1929 page 107
See also this article on The Watchtower Society and Medical Quackery.